Manufacture of sheet metal g-ans



R. H. SMITH, MANUFACTURE OF SHEET METAL CANS. APPLICATION FILED AUG. 25, 1908.

932,341, Patented Aug. 24, 1909.

n s Le 1 5? y? UNIT D srA'frn-s PATENT OF 10E.

' 'mcnann' 'r'mmnr sm'rn, or BALTIMORE, MARYLAN MANUFACTURE or SIEET-METAL cans.

To oll whom it may concern:

Be it known that I, RICHARD HENRY SMITH, of the city of Baltimore, State-of from the can head to .produoetheffilling aperture of the can, as the cap which is adapted to be soldered. over thesaid aperture to close-the same, as will hereinafter fully appear.

I final stage of its manufacture, to ether with- 'In the further description of the said invention which follows, reference is made to. the accompanying drawing forming a part hereof and in which,

Figure 1 is a top or flat view of the blank from which the can head and cap are formed,

Fig.

and Fig. 2- a cross section of the same. 3 showsv thedl'ead at the conclusion of .the first step in its manufacture, and Fig. 4 the same with t'hecap detached from the head.

Fig. 5 shows the head.as it appears in the the cap which is placed over the ling'aperture and slightly elevated above the head.

. Fig. 6 is a cross section of the punch and. die

whereby theflat blank is brought to the condition illustrated in Fig.4 and Fig. '7 a. cross section of the tool whereby the portion of the head which surrounds the filling aperture; is changed in-position' or to the shape shown in Fig. 5..

R ferring now to the drawing 1 is the-- punch, 2 the die, and a an annular lip at the circumference of the. punch, which in con.-

nection with the cutting edge 6 of the die produces from theblank the circular disk 4 shown'in Fig. 1. 'The inner circumference of the lip a in connection with the annular face 0 on the central block d of the die,

he upper surface of the central block (1. of the die has a co ation corresponding with that to be roduceid the head and cap, as shown in ig. 3; the annulus g on the lower side of the punch serving to press the trated in Fig. 3. Immediately above the annulus g is a circular cutting edge which Patented Aug. 24, 1909. Application filed August 25, 1908. Serial No. 45b,f93.

upon thepunch reaching its extreme downward movement, comes practicallyinto contact with the edge 7c of the diean'd'severs'the ca from the head at m..

reference to Fig. 4 it will be seen thatthe ip' 7L which surrounds the filling aperture 3, is vertical and of the same diameter as the lower edge of the cap, and therefore not JV adapted'to receive that device, I therefore, in a subsequent operationemploy the tool 5 surface 0 ofthe proper diameter and depth, and upon. being forced over the saidvertlcal whichis provided with an inclined inner lip causes the same tobe deflected angularlyinward and made to take the shape shown in Fig. 5, thereby adapting it to receive the cap. I

From. the foregoingdescription it will be understood that in a single operation of the punch which consists in a downward motion toward the die, 'the cap'is not only correctly formed but cut from the head, and that in 'the-sec0nd,0perati0n effected blyl the tool 5 the li n is adapted to receive t e cap.

I c aim as my invention, I v e The" improvement in the manufacture of sheet-metal cans whereby the disk punched from the head in forming the filling aperture is adapted as a cap to close the same, which consists in stamping or drawing on the can head, a projection having a cap-shaped. crown, and below the said crown anannulal';

crea'se and at the same operationcutting the.

crown from the said'proje'ction to form a cap, and then r'drawing'orbending inward the annular lip left "in the separationtherefrom of the cap, and that independently of the head adjacent thereto, whereby the said -l1p is adapted to receive the cap, substan: tially as specified; l

RICHARD Witnesses:

EUGENE .W. HQDSON, A. J.-HrroH. 

